similar to: SIGSEGV in R_RunWeakRefFinalizer, object allocated with Rcpp

R's dyn.unload() will unconditionally unload the given shared object; it does not check whether there is any object (external pointer or weak reference) with a C finalizer pointing into the space of the shared object being unloaded. So it is expected that R will segfault later when such finalizer is run. Currently there is no other way than to handle this on the side of the shared

On Thu, 9 Aug 2018, Dirk Eddelbuettel wrote: > > On 9 August 2018 at 20:37, Tomas Kalibera wrote: > | So to answer your original question, this could probably be handled in > | Rcpp, > > Hm. Why do you say that / what did you have in mind? We say it because it is true. Rcpp registers C finalizers and running them after unloading will segfault. For now it would be better for

Hi I?aki, I think that "still reachable" memory is potentially a problem only if you cared about (frequent) package unloading, and if package unloading did not have correctness problems in the first place. I would only worry about "memory leaks" reported by valgrind. That your example (unloading a library while there is still an object with a finalizer implemented in that

On 9 August 2018 at 20:37, Tomas Kalibera wrote: | So to answer your original question, this could probably be handled in | Rcpp, Hm. Why do you say that / what did you have in mind? Recall that we do not alter SEXPs or introduce additional additional reference counters -- because we do not think that altering the basic R API for such calls would be a wise strategy. So we do more or less what

Thanks, Tomas, Luke, for the clarifications. Then, I have another question. But first, let me introduce how I ended up here, because obviously I just don't go around dyn.unloading things that I've just compiled. I was testing a package with valgrind. Everything ok, no leaks. Great. But I'm always suspicious (probably unjustifiably) of all the memory that is reported as "still

Can someone explain to me the mechanizm that Samba uses to relate Machines to Users? I am trying to set up a Samba-LDAP PDC and it seems to work OK but I get "No mapping between account names and security IDs was done." This would seem to be a simple user/group ownership/permissions thing. Now I have the following potentially pertinent ou's: People Computers Groups One

Hi, the following example aiming at a class containing a logical slot segfaults under R-1.9.0 when `gctorture(on = TRUE)' is used: Code code (dummy.c): #include <Rdefines.h> SEXP foo() { SEXP ans; PROTECT(ans = NEW_OBJECT(MAKE_CLASS("test"))); SET_SLOT(ans, install("lgl"), allocVector(LGLSXP, 1)); LOGICAL(GET_SLOT(ans,

Full_Name: R User Version: 2.7.2 (default binary) OS: Windows XP SP2 Submission from: (NULL) (83.25.29.163) Hello! I have conducted following experiment running simple R script: for (i in 1:10000) { a<-0 for (j in 1:1000) a<-c(a,j) } profiled R.dll using Intel Vtune and obtained following results!!! Func. Name Clocticks locale2charset 46,58%

Hi List, I'd imagine this is a question that has been answered before, but I can't seem to track it down, sorry for the duplication if it has. I am writing an interface for a C library and want to return an S4 class from the 'constructing' method. One of the slots of the argument to be returned will be filled with one of the arguments passed to the function. My question is about

hi, I have been attempting to run this script and am getting some strange results. The script connects to a database and retrieves a series of tables, using sequential sql statements. I have tested all of the sql statements in the PostGreSQL terminal and they all return the desired results. I place each table into a list and run a FOR loop for 'i' in the list. The script generates

I am using C code to create an S4 object based on Douglas Bates's example in his lecture notes on <http://www.ci.tuwien.ac.at/Conferences/DSC-2003/Tutorials/RExtensions/slide s.pdf> http://www.ci.tuwien.ac.at/Conferences/DSC-2003/Tutorials/RExtensions/slides .pdf e.g. SEXP La_DGE_dc(SEXP A) { SEXP aa = PROTECT(duplicate(A)); SEXP adims, pivot, val; int

This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_000_01C3738F.63DE3390 Content-Type: text/plain; charset="iso-8859-1" #I want to be able to create a new S4 class and read data into it using C code # Here is a very simple S4 object inheriting from "array", but with 5

What exactly is a reference object? I'm getting this error message attempting to register a finalizer: can only weakly reference/finalize reference objects I don't see any problem with the code... Here's what appears to be the relevant portions. setClass("PDNNObject", representation(handle = "externalptr", id =

Hi Everyone, At the end of this email is a transcript of a problem I have found in RODBC version 2.3-1. It appears that the bug fix in odbcClose for the memory leak has meant that the garbage collector is falling over when it tries to free up the extPtr attribute of the RODBC connection pointer. Any advice on how to fix this? Thanks for your help, Tom

Hi, I have an SEXP obj in a C function called via .Call(). The obj is protected (in fact it is an argument to .Call and therefore automatically protected). If I set an attribute of obj does the attribute become protected too? Here is an example SEXP foo(SEXP obj) { SET_NAMES(obj, NEW_CHARACTER(3)); /* are names protected or not? */ ... } Thanks, Vadim [[alternative HTML version

Hi, (somebody would probably yell at me for not checking 2.6.0rc, for which I can only apologize...) Our R package (snpMatrix in http://www-gene.cimr.cam.ac.uk/clayton/software/) is broken rather badly in 2.6.0 ; I have fixed most of it now so a new release is imminent; but I'd like to mention a few things, mostly to summarize my experience and hopefully the 'writing R extensions'

Hi, I have followed the recommended steps for creating a package (rctest). As of now, my goal is simply to understand how various pieces fit together. The package includes: (1) C code with source in sub-directories, compiled to create a static library. (a) There is a single C-struct (dns) a simple 'matrix': {int m; int n; double *d;} (b) C code to create random matrix of a certain size.

I've rolled up R-1.6.2.tgz a short while ago. This is a minor upgrade, fixing an assortment of bugs. You can get it from the developer site at http://cvs.r-project.org/pub/CRAN/src/base/R-1.6.2.tgz or wait for it to be mirrored at a CRAN site near you. Binaries for various platforms will appear in due course. There is also a version split for floppies, but due to the inclusion of

I've rolled up R-1.6.2.tgz a short while ago. This is a minor upgrade, fixing an assortment of bugs. You can get it from the developer site at http://cvs.r-project.org/pub/CRAN/src/base/R-1.6.2.tgz or wait for it to be mirrored at a CRAN site near you. Binaries for various platforms will appear in due course. There is also a version split for floppies, but due to the inclusion of

This patch updates dbomatic, taskomatic and host-register to use the new C++ wrapped ruby QMF bindings. It also fixes a couple of bugs along the way including the 0 cpu bug for host-register. This is a compilation of work done by myself and Arjun Roy. Signed-off-by: Ian Main <imain at redhat.com> --- src/db-omatic/db_omatic.rb | 111 ++++++-------